Bail Type Unlocking and Resetting Device for Hot Pluggable Opto-electronic Module

ABSTRACT

An unlocking and resetting device for an opto-electronic module comprises a casing having a blind hole and a horizontal slide slot, and first and second mounting parts; an elastic piece; a shell; first springs; an insert block adapted to be inserted into the blind hole; a brake member adapted to be inserted and disposed in the horizontal slide slot; second springs; first and second pressing blocks adapted to be mounted onto first and second mounting parts; and a bail having a cam portion. The single-arm bail of the unlocking and resetting device can return the start position automatically without manual repositions.

BACKGROUND OF THE INVENTION

1. Technical Field of the Invention

The present invention generally relates to an unlocking and resettingdevice for opto-electronic module used in optical communication field,and particularly, to an unlocking and resetting device for hot pluggableopto-electronic module such as an optical transceiver, which is providedwith a bail.

2. Description of the Related Art

Conventionally, there are mainly two types of unlocking manner in whicha hot pluggable opto-electronic module can be unlocked: the firstunlocking manner in which the hot pluggable opto-electronic module isunlocked by pushing the locking elastic piece of the shielding cage up,and the second unlocking manner in which the hot pluggableopto-electronic module is unlocked by lowering a projecting block on thehousing of the opto-electronic module having locking functions below thetop surface of the housing.

Chinese Utility Model Application CN2687957Y has disclosed an unlockingdevice in which the second unlocking manner is employed, and theunlocking device comprises a casing, a shell, an insert block, a brakemember, a bail, a pin, and springs.

The insert block is inserted into a vertical groove of the casing, andthe shell is fitted over the casing from above so as to limit the insertblock. The brake member is inserted into a horizontal slot and the bailis mounted to the casing by means of the pin so as to rotate about thepin. The horizontal beam of the bail pushes against the rear end surfaceof the brake member so as to push the brake member toward the cage. Thesecond bevel at the front end surface of the brake member abuts againstthe first bevel of the insert block, so that the insert block is presseddown so as to achieve the unlocking.

The springs are disposed between the insert block and the casing andbetween the brake member and the casing and used to restore the insertblock and the brake member. The second unlocking manner is applicable toa compact cage.

SUMMARY OF THE INVENTION

The present invention is directed to improvements on the conventionalunlocking device, so that the unlocking and resetting device of thepresent invention is easy to be mounted, can be restored excellently,has good griping feeling, and is suitable for a more compact cageapparatus.

Accordingly, embodiments of the present invention is to provide anunlocking and resetting device adapted for various hot pluggableopto-electronic modules and satisfying the requirements of thedevelopments of communication equipment.

According to an aspect of the present invention, there is provided withan unlocking and resetting device for an opto-electronic module,comprising: a casing having a substantially rectangular parallelepipedshape and formed with a blind hole and a horizontal slide slot, in whichthe blind hole is formed vertically in the casing adjacent to the firstend of the casing and the horizontal slide slot is formed at a topsurface of the casing and closer to the first end than the blind hole,and first and second mounting parts are formed in the top surface of thecasing at both sides of the horizontal slide slot and symmetrical witheach other about a longitudinal axis of the casing; an elastic pieceadapted to be mounted onto the casing from a bottom of the casing; ashell adapted to be fitted over the casing from a top of the casing;first springs adapted to be disposed in the blind hole; an insert blockadapted to be inserted into the blind hole, in which a slide groove isformed vertically at a top end of the insert block and a bottom end ofthe insert block is to be supported by the first springs; a brake memberadapted to be inserted and disposed in the horizontal slide slot; secondsprings to be disposed between the horizontal slide slot and the brakemember along the longitudinal direction of the casing; first and secondpressing blocks adapted to be mounted onto first and second mountingparts and formed with first and second extensions respectively, in whichfirst and second U-shape grooves are formed in bottom surfaces of thefirst and second extensions respectively; and a bail disposed at thefirst end of the casing and including a handle, a second side arm, asecond connection arm, a second rotation shaft, a cam portion, a firstrotation shaft, a first connection arm, and a first side arm which areconnected orderly, in which the cam portion is adapted to abut a frontend of the brake member and the first and second rotations are adaptedto be received in the first U-shape groove of the first pressing blockand the second U-shape groove of the second pressing block,respectively.

Further, a boss is formed on a bottom surface of the blind hole, firstand second conical protrusions are formed on first and second endsurface portions of the horizontal slide slot respectively for engagingthe second springs; and first and second projecting bars are extendedfrom the first and second end surface portions along and on the bottomsurface of the horizontal slide slot for positioning the second springs.

Preferably, a first bevel is formed in the slide groove of the insertblock, and an extension projection is formed on the bottom end of theinsert block.

Moreover, the first pressing block are formed with front and rear bosseson a bottom surface thereof, a first through hole is formed between thefirst boss and the second boss, and a first side wall is extended fromthe bottom surface of the first pressing block at a side of the frontand rear bosses and at the first end of the first pressing blockadjacent to the front boss, and the second pressing block are formedwith front and rear bosses on a bottom surface thereof, a second throughhole is formed between the first boss and the second bosses, and asecond side wall is extended from the bottom surface of the secondpressing block at a side of the front and rear bosses and at the firstend of the second pressing block adjacent to the front boss.

Preferably, an angle α formed between a plane where the cam portion islocated and the first connection arm as well as the second connectionarm is in a range of 72 to 78 degree.

Further, the handle is made of a plastic material having good gripingfeeling.

In addition, the brake member has a front end surface, a rear endsurface opposite to the front end surface, first and second stop lugsextended from two side surface of the brake member adjacent to the frontend surface and the bottom surface of the brake member respectively, anda slide rod extended from the rear end surface of the brake member, anda second bevel is formed at a distal end of the slide rod and adapted toabut against the first bevel.

Further, an angle β between the second bevel and the horizontal plane isin a range of 27 to 33 degree.

With the present invention, the following advantages can be achieved.

1. The operations of mounting and unlocking the opto-electronic moduleconform to the user's habits, so that it is not necessary for the userto remember the operations painstakingly and to have great skills.

2. The assembling and disassembling can be performed by using the brakedevice of the opto-electronic module without depending on the metalshielding cage and device panel, and the unlocking and resetting deviceis suitable for the cage which has stricter requirements.

3. The bail can be assembled easily and simply and has a highreliability.

4. The bail of the unlocking and resetting device can return (restore)to the start position automatically without manual resetting operations.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded schematic view showing structure of the unlockingand resetting device according to an embodiment of the presentinvention;

FIG. 2 is a schematic view showing the first pressing block of theunlocking and resetting device in FIG. 1;

FIG. 3 is a schematic view showing the second pressing block of theunlocking and resetting device in FIG. 1;

FIG. 4 is a schematic view showing the bail of the unlocking andresetting device in FIG. 1;

FIG. 5 is a schematic perspective view showing the bail of the unlockingand resetting device in FIG. 1;

FIG. 6 is a schematic view showing the mounting of bail of the unlockingand resetting device in FIG. 1;

FIG. 7 is a schematic view showing the mounting of insert block of theunlocking and resetting device in FIG. 1;

FIG. 8 is a schematic view showing the mounting of second springs of theunlocking and resetting device in FIG. 1;

FIG. 9 is a schematic view showing the brake member of the unlocking andresetting device in FIG. 1;

FIG. 10 is a schematic view showing the relative position of theunlocking and resetting device in the cage, in which two opto-electronicmodules are shown.

REFERENCE NUMERALS IN THE DRAWINGS

100—casing; 101—second end surface portion; 102—first threaded hole;

101 a—first mounting part; 101 b—second mounting part;

103—first end surface portion;. 104 a, 104 b—front notch;

105—first top surface; 106 a, 106 b—rear notch; 107—second threadedhole;

108—second top surface; 109—boss; 1010—blind hole;

1011—first projecting bar; 1012—first conical protrusion;

1013—horizontal slide slot; 1014—second projecting bar;

1015—second conical protrusion; 1016—first end surface portion;

1017—second end surface portion; 1018—catching hook;

110—insert block; 111—extension projection; 112—slide groove;

113—fist bevel; 114—projecting surface; 120—first spring;

130—elastic piece; 131—catching groove; 140—first pressing block;

141—first extension; 142—front boss; 141 a—first U-shape groove;

143—bottom surface; 144—first through hole; 145—rear boss;

146—first side wall; 147—stop surface; 150—second spring; 160—bail;

161—handle; 162—second side arm; 163—second connection arm;

164—second rotation shaft; 165—cam portion; 166—first rotation shaft;

167—first connection arm; 168—first side arm; 170—brake member;

171—front end surface; 172—second bevel; 173—first stop lug; 174—secondstop lug;

175—slide rod; 180—second pressing block; 181—second extension;

181 a—U-shape groove;

182—front projection; 183—bottom surface; 184—second through hole;

185—rear projection; 186—second side wall; 187—stop surface; 190—screw;

200—shell; 201—top surface; 202—through opening; 203—catching groove

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

Embodiments of the present invention will be described in detail withreference to drawings, the embodiments described herein are explanatoryand illustrative and shall not be construed to limit the presentinvention. The same elements are denoted by like reference numeralsthroughout the descriptions.

As shown in FIG. 1, an unlocking and resetting device foropto-electronic module such as an optical transceiver according to anembodiment of the present invention comprises two first springs 120, anelastic piece 130 having a substantial U-shape cross-section, two secondsprings 150, screws 190, a shell 200, a casing 100, an insert block 110,a first pressing block 140, a second pressing block 180, a bail 160, anda brake member 170.

The components of the unlocking and resetting device for opto-electronicmodule according to an embodiment of the present invention are describedbelow respectively.

1. Casing 100

As shown in FIGS. 1 and 7-8, the casing 100 has a substantiallyrectangular parallelepiped shape. More particularly, a blind hole 1010is formed vertically in the casing 100 adjacent to the first end (rightend in FIG. 1) of the casing 100, the blind hole 1010 preferably has asquare cross-section. A boss 109 is formed on the bottom surface of theblind hole 1010 and projects upwards from the bottom surface of theblind hole 1010, as shown in FIG. 7.

Near the first end of the casing 100, a first mounting part 101 a and asecond mounting part 101 b are formed on the top surface of the casing100 and are symmetrical about a longitudinal axis of the casing 100. Thefirst and second mounting parts 101 a, 101 b are formed with a firstthreaded hole 102 and a second threaded hole 107, respectively. Thefirst and second pressing blocks 104, 108 will be received by andmounted on the first and second mounting parts 101 a, 101 b,respectively.

At the top surface of the casing 100, a horizontal slide slot 1013 isformed between the first threaded hole 102 and the second threaded hole107, and a first conical protrusion 1012 is formed on a substantialcenter of a first end surface portion 1016 (left end surface in FIG. 1)and a second conical protrusion 1015 is formed on a substantial centerof a second end surface portion 1017 (left end surface in FIG. 1). Firstand second projecting bars 1011, 1014 are formed in the horizontal slideslot 1013. The first projecting bars 1011 has a substantially triangularcross-section and is extended from the first end surface portion 1016along and on the bottom surface of the horizontal slide slot 1013, andthe second projecting bars 1014 has a substantially triangularcross-section and is extended from the second end surface portion 1017along and on the bottom surface of the horizontal slide slot 1013.

The insert block 110 is to be inserted and fitted into the blind hole1010, the boss 109 is used to position the two first springs 1012. Thefirst and second mounting parts 101 a, 101 b of the casing 100 are usedto receive and fit with the first and second pressing blocks 104, 108.Screws 190 pass through first and second through holes 144, 184 of thefirst and second pressing blocks 104, 108 and then screw into the firstand second threaded holes 102, 107, respectively. The brake member 170is to be fitted into and received in the horizontal slide slot 1013. Thefirst conical protrusion 1012 positions one end of one of the secondsprings 150, and the second conical protrusion 1015 positions one end ofthe other of the second springs 150. The first and second projectingbars 1011, 1014 are used to limit and hold the two second springs 150,respectively.

2. Insert Block 110

As shown in FIGS. 1, 7, and 10, the insert block 110 has a structure inthe form of a long block. More particularly, a slide groove 112 isformed at a center portion at the top end of the insert block 110 andextended towards the bottom end of the insert block 110 by apredetermined depth. A first bevel 113 is formed in the slide groove112, as shown in FIG. 10. In FIGS. 1 and 10, the first bevel 113 isupgrade leftward. An extension projection 111 is formed at the bottomend of the insert block 110 and extended downward.

A lower part of the insert block 110 is inserted and fitted into theblind hole 1010 of the casing 100, and an upper part of the insert block110 passes through the through opening 202 formed through the topsurface of the shell 200 so as to be engaged with the locking elasticpiece of the shielding cage (not shown). A slide rod 175 of the brakemember 170 is slidably fitted in the slide groove 112 such that thefirst bevel 113 in the slide groove 112 will match and fit with a secondbevel 172 formed at the tip end of the slide rod 175. Preferably, thefirst bevel 113 and the second bevel 172 have the same slope, as shownin FIG. 10. The extension projection 111 cooperates with the boss 109 atthe bottom surface of the blind hole 1010 so as to position the firstsprings 120, as shown in FIG. 10.

During mounting, the two first springs 120 are first inserted into theblind hole 1010 along both sides of the blind hole 1010. Next, theinsert block 110 is inserted into the blind hole 1010 from above andthen presses the two first springs 120. Finally, the shell 200 is fittedover the casing 100 from above and mounted thereto. The direction ofinserting the insert block 110 is perpendicular to that of inserting theopto-electronic module into the shielding cage.

3. First Springs 120

As shown in FIGS. 7 and 10, the first springs 120 are verticallyinserted into and disposed in the blind hole 1010 of the casing 100 soas to bias the insert block 110 upward, so that the insert block 110 canreturn (restore) to its initial position.

4. Elastic Piece 130

As shown in FIG. 1, the elastic piece 130 has a substantial U-shape withcatching grooves 131 being provided at both side walls of the elasticpiece 130. Engagement between the elastic piece 130 and the casing 100is similar to that between the shell 200 and the casing 100, that is,the catching grooves 131 are engaged with catching hooks (not shown) soas to mount the elastic piece 130 to the casing 100.

5. First Pressing Block 140

As shown in FIGS. 1-2 and 6, the first pressing block 140 is a blockformed with a through hole and U-shape groove. Particularly, a rear boss(left boss in FIGS. 1-2 and 6) 145 and a front boss (right boss in FIGS.1-2 and 6) 142 are formed on the bottom surface of the first pressingblock 140. A first through hole 144 is formed through the first pressingblock 140 between the front and rear bosses 142, 145. A first side wall146 is extended from the bottom surface of the first pressing block 140at a side of the front and rear bosses 142, 145 and at a first end(right end in FIGS. 1 and 6) of the first pressing block 140 adjacent tothe front boss 142. A first extension 141 a is extended from the firstend surface of the first pressing block 140, and a first U-shape groove141 is formed in the bottom surface of the first extension 141 a.

The front and rear bosses 142, 145 of the first pressing block 140 areto be fitted in front and rear notches 104 a, 106 a respectively so asto accurately position the first pressing block 140 on the casing 100,in which the front and rear notches 104 a, 106 a are formed at front andrear sides of the first threaded hole 102 of the first mounting part 101a along the longitudinal direction of the casing 100 (right and leftdirection in FIGS. 1 and 6).

In the assembled state of the opto-electronic module, when a handle 161of the bail 160 is rotated upward, a first rotation shaft 166 of thebail 160 applies an acclivitous force to the first pressing block 140 bypressing against the first U-shape groove 141 of the first extension 141a. The first side wall 146 of the first pressing block 140 serves thefunction of reinforcing.

One screw 190 passes through the first through hole 144 and then isscrewed into the first threaded hole 102, so that the bottom surface 143of the first pressing block 140 abuts on the first top surface 105 ofthe first mounting part 101 a of the casing 100.

6. Second Pressing Block 180

As shown in FIGS. 1, 3 and 6, the structure of the second pressing block180 is symmetrical with that of the first pressing block 180 about thelongitudinal axis of the casing 100.

Particularly, a rear boss (left boss in FIGS. 1-2 and 6) 185 and a frontboss (right boss in FIGS. 1-2 and 6) 182 are formed on the bottomsurface of the second pressing block 180. A second through hole 184 isformed through the second pressing block 180 between the front and rearbosses 182, 185. A second side wall 186 is extended from the bottomsurface of the second pressing block 180 at a side of the front and rearbosses 182, 185 and at a first end (right end in FIGS. 1 and 6) of thesecond pressing block 180 adjacent to the front boss 182. A secondextension 181 a is extended from the first end surface of the secondpressing block 180, and a second U-shape groove 181 is formed in thebottom surface of the second extension 181 a.

The front and rear bosses 182, 185 of the second pressing block 180 areto be fitted in front and rear notches 104 b, 106 b respectively so asto accurately position the second pressing block 180 on the casing 100,in which the front and rear notches 104 b, 106 b are formed at front andrear sides of the second through hole 107 of the second mounting part101 b along the longitudinal direction of the casing 100 (right and leftdirection in FIGS. 1 and 6).

In the assembled state, when a handle 161 of the bail 160 is rotatedupward, a second rotation shaft 164 of the bail 160 applies anacclivitous force to the second pressing block 180 by pressing againstthe second U-shape groove 181 of the second extension 181 a. The secondside wall 186 of the second pressing block 180 serves the function ofreinforcing.

Another screw 190 passes through the second through hole 184 and then isscrewed into the second threaded hole 107, so that the bottom surface183 of the second pressing block 180 abuts on the second top surface 108of the second mounting part 101 b of the casing 100.

7. Second Spring 150

As shown in FIGS. 1 and 8, two springs 150 are fitted over the first andsecond conical protrusions 1012, 1015 and disposed horizontally in thehorizontal slide slot 1013, respectively. A first stop lug 173 of thebrake member 170 contacts one end of one second spring 150 and a secondstop lug 173 contacts one end of the other second spring 150, in whichthe first and second stop lugs 173, 174 are extended from two sidesurface adjacent to the front end surface 171 and the bottom surface ofthe brake member 170. The second springs 150 enable the brake member 170to return (restore) to its initial position.

8. Bail 160

As shown in FIGS. 1, 4-5, and 6, the bail 160 is in the form of asubstantially square endless ring which is symmetrical about thevertical axis X (see FIGS. 1 and 5) of the bail 160. Specially, the bail160 comprises a handle 161, a second side arm 162, a second connectionarm 163, a second rotation shaft 164, a cam portion 165, a firstrotation shaft 166, a first connection arm 167, and a first side arm 168which are connected in sequence.

The handle 161 is preferably made of a material having a good gripingfeeling, such as plastic.

During assembling, the first rotation shaft 166 and the second rotationshaft 164 are received and fitted in the first U-shape groove 141 of thefirst pressing block 140 and the second U-shape groove 181 of the secondpressing block 180 respectively, and the cam portion is brought intocontact with the front end surface 171 of the brake member 170 so as toapply a force to the brake member 170 in a direction parallel to thedirection of inserting the opto-electronic module into the cage.

In the locking state, the first side arm 168 and the second side arm 162are brought into contact with the first end surface portion 103 and thesecond end surface portion 107 of the first end surface of the casing100. During unlocking, the cam portion 166 pushes against the front endsurface 171 of the brake member 170 such that the brake member 170 ispushed toward the cage. When unlocking the opto-electronic module, thehandle 161 is pulled up, and the finish position of the rotation of thebail 160 is ensured by contacts between the first and second connectionarms 167, 168 and the stop surfaces 147, 187 of the first and secondpressing blocks 140, 180.

FIG. 4 is a side view of the bail 160, in which an angle α is formedbetween a plane where the cam portion 165 is located and the firstconnection arm 167 as well as the second connection arm 163. In order toadjust the stroke of the brake member 170 as an optimal value, the angleα is preferably in the range of 72 degree to 78 degree.

FIG. 10 shows the relative position of the unlocking and resettingdevice in the cage, in which two opto-electronic modules are shown. Whenthe opto-electronic module is in the unlocked state, the uppermost pointof the bail 160 is still located below the top surface of theopto-electronic module, even in a compact cage, the two opto-electronicmodules will not interfere with each other during unlocking.

The mounting operation of the bail 160 is as follows: firstly, the bail160 is placed at the light opening end surface (first end surface, rightend surface in FIGS. 1 and 6). Next, the first and second pressingblocks 140, 180 are disposed on the first and second top surface 105,108 of the first and second mounting part 101 a, 101 b respectively.Finally, two screws 190 pass through the first and second through holes144, 184 and are then screwed into the first and second threaded holes102, 107, respectively. Thereby, the mounting of the bail 160 isaccomplished.

9. Brake Member 170

As shown in FIGS. 1, 9 and 10, the brake member 170 is a substantiallyrectangular parallelepiped block having a slide rod 175 and first andsecond stop lugs 173,174. Specially, the brake member 170 has a frontend surface (right end surface in FIGS. 1 and 9) 171, a rear end surfaceopposite to the front end surface, first and second stop lugs 173, 174extended from two side surface of the brake member 170 adjacent to thefront end surface 171 and the bottom surface of the brake member 170respectively, a slide rod 175 extended from the rear end surface of thebrake member 170, in which a second bevel 172 is formed at a distal end(left end in FIGS. 1 and 9) of the slide rod 175.

The assembling operation of the brake member 170 is as follows: thebrake member 170 is horizontally inserted and fitted into the horizontalslide slot 1013 of the casing 100, in which the slide rod 175 isinserted into the slide groove 112 of the insert block 110 and thesecond bevel 172 is brought into contact with and abuts against thefirst bevel 113 of the insert block 110. In order to ensure a good slidefit between the brake member 170 and the insert block 110, the slope ofthe first bevel 113 is preferably identical with that of the secondbevel 172. As shown in FIG. 9, an angle β between the second bevel 172and the horizontal plane is preferably in the range of 27 degree to 33degree. The first and second lugs 173, 174 contact and abut against thesecond springs 150, so that the second springs 150 applies a horizontalpushing force to the brake member 170. The moving direction of the brakemember 170 during unlocking is consistent with that of inserting theopto-electronic module into the cage.

10. Screw 190

As shown in FIGS. 1 and 6, the screws 190 are used to fix the first andsecond pressing blocks 140, 180 onto the casing 100.

11. Shell 200

As shown in FIG. 1, the shell 200 is in the form of a long U-shapemember. A through opening 202 is formed through the top surface of theshell 200 and a plurality of catching grooves 203 are formed at bothsides of the shell 200 adjacent to the bottom of the shell 200.

The assembling operation of the shell 200 is as follows: the shell 200is fitted over the casing 100 from above, and the catching grooves 203will be engaged with the catching hooks 1018 of the casing 100. Theupper portion of the insert block 110 will be inserted through thethrough opening 202. The shell 200 can position the insert block 110 andalso protect the other components such as a printed circuit board in thecasing 100 from outer environment.

The operation of the unlocking and resetting device according to theembodiment of the present invention is described below.

When the opto-electronic module is in the locking state, the first sidearm 168 and the second side arm 164 of the bail 160 abut against thefirst and second end surface portions 103, 101 of the casing 100respectively.

The bail 160 is rotated such that the cam portion 165 pushes against thefirst end surface 171 of the brake member 170, thereby the brake member170 is pushed toward the cage. The second bevel 172 of the brake member170 abuts against the first bevel 112 of the insert block 110 so as topress the insert block 170. When the first and second connection arms167, 163 contact the stop surface 147 of the first pressing block 140and the stop surface 187 of the second pressing block 180 respectively,the bail 160 stops rotating, and the projecting surface 114 of theinsert block 110 is lowered below the top surface 201 of the shell 200,so that the opto-electronic module is in the unlocking state.

Upon releasing the bail 160, since the insert block 110 is biased by thefirst springs 120 and the brake member 170 is biased by the secondsprings 150, the first end surface 171 of the brake member 170 pushesagainst the cam portion 165 of the bail 160, so that the bail 160returns (restores) to its initial position.

It should be noted that the components, structures and functions of theunlocking and resetting device and the opto-electronic module that arenot described herein are identical with that in the prior art, so thattheir detailed descriptions are omitted here for purpose of concision.

Although preferred embodiments have been shown and described, it wouldbe appreciated by a person skilled in the art that changes can be madeto the present invention without departing from its substantial spiritor essential principle. All the changes occurring within the scope ofthis invention or within the equivalent scope are included in thisinvention.

1. An unlocking and resetting device for an opto-electronic module,comprising: a casing having a substantially rectangular parallelepipedshape and formed with a blind hole and a horizontal slide slot, in whichthe blind hole is formed vertically in the casing adjacent to the firstend of the casing and the horizontal slide slot is formed at a topsurface of the casing and closer to the first end than the blind hole,and first and second mounting parts are formed in the top surface of thecasing at both sides of the horizontal slide slot and symmetrical witheach other about a longitudinal axis of the casing; an elastic pieceadapted to be mounted onto the casing from a bottom of the casing; ashell adapted to be fitted over the casing from a top of the casing;first springs adapted to be disposed in the blind hole; an insert blockadapted to be inserted into the blind hole, in which a slide groove isformed vertically at a tope end of the insert block and a bottom end ofthe insert block is to be supported by the first springs; a brake memberadapted to be inserted and disposed in the horizontal slide slot; secondsprings to be disposed between the horizontal slide slot and the brakemember along the longitudinal direction of the casing; first and secondpressing blocks adapted to be mounted onto first and second mountingparts and formed with first and second extensions respectively, in whichfirst and second U-shape grooves are formed in bottom surfaces of thefirst and second extensions respectively; and a bail disposed at thefirst end of the casing and including a handle, a second side arm, asecond connection arm, a second rotation shaft, a cam portion, a firstrotation shaft, a first connection arm, and a first side arm which areconnected in sequence, in which the cam portion is adapted to abut afront end of the brake member and the first and second rotations areadapted to be received in the first U-shape groove of the first pressingblock and the second U-shape groove of the second pressing blockrespectively.
 2. The unlocking and resetting device for opto-electronicmodule according to claim 1, wherein: a boss is formed on a bottomsurface of the blind hole; first and second conical protrusions areformed on first and second end surface portions of the horizontal slideslot respectively for engaging the second springs; and first and secondprojecting bars are extended from the first and second end surfaceportions along and on the bottom surface of the horizontal slide slot.for positioning the second springs.
 3. The unlocking and resettingdevice for opto-electronic module according to claim 1, wherein: a firstbevel is formed in the slide groove of the insert block; and anextension projection is formed on the bottom end of the insert block. 4.The unlocking and resetting device for opto-electronic module accordingto claim 1, wherein: the first pressing block are formed with front andrear bosses on a bottom surface thereof, a first through hole is formedbetween the first boss and the second boss, and a first side wall isextended from the bottom surface of the first pressing block at a sideof the front and rear bosses and at the first end of the first pressingblock adjacent to the front boss; and the second pressing block areformed with front and rear bosses on a bottom surface thereof, a secondthrough hole is formed between the first boss and the second bosses, anda second side wall is extended from the bottom surface of the secondpressing block at a side of the front and rear bosses and at the firstend of the second pressing block adjacent to the front boss.
 5. Theunlocking and resetting device for opto-electronic module according toclaim 1, wherein: an angle α formed between a plane where the camportion is located and the first connection arm as well as the secondconnection arm is in a range of 72 to 78 degree.
 6. The unlocking andresetting device for opto-electronic module according to claim 1,wherein: the handle is made of a plastic material having good gripingfeeling.
 7. The unlocking and resetting device for opto-electronicmodule according to claim 1, wherein: the brake member has a front endsurface, a rear end surface opposite to the front end surface, first andsecond stop lugs extended from two side surface of the brake memberadjacent to the front end surface and the bottom surface of the brakemember respectively, and a slide rod extended from the rear end surfaceof the brake member, and a second bevel is formed at a distal end of theslide rod and adapted to abut against the first bevel.
 8. The unlockingand resetting device for opto-electronic module according to claim 7,wherein: an angle β between the second bevel and the horizontal plane isin a range of 27 to 33 degree.